Apparatus for producing lead oxid.



W. INNBS.

APPARATUS FOR PRODUCING LEAD OXID.

APPLIGATION FILED APIL19, 1913.

1,113,123. Patented Oct. 6, 1914.

10 SHEBTSSHEBT 1 E O O MW yaw amw' W. INNES.

APPARATUS FOR PRODUCING LEAD OXID.

APPLICATION FILED APR.19, 1913.

1,1 13,123. Patented 0ct.6,1914

10 SHEETS-SHEET 2.

W m Am W. INNES.

APPARATUS FOR PRODUCING LEAD OXID. APPLICATION FILED APRJQ, 1913.

1, 1 1 3, 123. Patented Oct. 6, 1914.

10 SHEETS-SEES! 3.

W. INNES.

APPARATUS FOR PRODUCING LEAD OXID. APPLICATION FILED APRJQ, 1913.

1,1 13,123. Patented 0013.6,1914.

10 SHEETS-SHEET 4.

W/T/YFJJFS; I NVE'NTGR/ W. INNES.

APPARATUS FOR PRODUCING LEAD OXID.

APPLICATION FILED APRJQ, 1913.

Patented Oct. 6, 1914. 1o SHEETS-SHEET 5.

FL'gIZ W/T/VF SESI W. INNES.

APPARATUS FOR PRODUCING LEAD OXID.

APPLICATION FILED APRJQ, 1913.

Patented Oct. 6, 1914.

10 SHEETSSHBET 6.

WITNESSES,

W. INNES.

APPARATUS FOR PRODUCING LEAD OXID.

APPLICATION FILED APR.19, 1913.

Patented Oct. 6, 1914.

10 SHEETS-SHEET 7 a I w I l/IIIIIIIIIIII IIIIIIIIIIIIIIIlIIIIIIII/IIII/W. INNES.

APPARATUS FOR PRODUCING LEAD OXID- APPLICATION FILED APR. 19, 1913.

Patented 0015.6,1914.

10 SHEETS-S HEET 8.

Fig 27. "I

ATri'.

W. INNES.

APPARATUS FOR PRODUCING LEAD OXID.

APPLICATION FILED APR.19, 1913.

Patented 0011.6, 1914 1o SHEETS-SHEET 9 W. INNES.

APPARATUS FOR PRODUCING LEAD OXID.

APPLICATION TILED APR. 19, 1913.

Patented 0011.6, 1914.

10 SHEETS-SHLET 10 lAVE/VTd/P; WW5;

WITNESSES,

WILLIAM INNES, ornIvERPooL, NGLAND."

I APPARATUS FOR PRODUCING LEAD OXID.

To all whom it may 00mm Be it known that 1, WILLIAM lnmisfa subject ofthe King of Great Britain,zre-

siding at 114 Carisbrooke road, Walton,

Apparatus for Producing Lead Oxid, of

wh ch the following is a specification, reference being had to thedrawings hereunto annexed and to the figures and letters markedthe'reonthat is to say:

t The invention relates to that class of ap paratus heretofore employedwhich consists of a circular covered potinto which metallic lead ispoured through a siphon and maintained in a fluid condition by a furnacebeneath the pot. This class of pot is provided with an outlet and with abafile plate or curtain near to the outlet while a horizontal paddle orstirrer is arranged near to the bottom of the pot and is rotated in suchmanner that it dashes the metallic lead against the baffle plate orcurtain whereby the lead becomes atomized. A blast of heated air orsteam or both is forced into the pot and-the atomized lead coming intocontact with it becomes oxidized and is carried away by the blastthrough a heated burning the bottom of the pot while on the other handovercharging would be liable to choke the pot and bend thepaddleorstirrer while the quantity of molten lead within the pot at all. timesis'necessarily sosmall that if the working of the pot were stopped fromany cause the tendency wouldbe for the leadandiozridlwithin the pgt'zatthat time to settle on thefbottom of .tliepot and fuse. Furthermore, themetallic lead and i also the oxid which are caused bythe splashing ofthe paddles of stirrers to accumulate on the inside of theipbt and itscover are liable to fall suddenly and either choke. the pot-or bend thes'tirrers or fall to the bottom of the potand fuse there to the injuryof the pot while inasmuch as 'it is a necessity Specification of LettersPatent. Application'fihd April s, 1913. Serial Ito/762,280

Patented Oct. 6, .1914.

of the system to maintain only a small depth of metallic lead in the potthe bottom of the pot is liable to speedily burn through,

, Now the object of the present invention is l by a simple arrangementof parts to remove these disadvantages.

In the accompanying drawings :Figure 1 is a vertical section taken onthe line l-1 of Fig. 3 of an apparatus for the production of lead oxidconstructed according to the present invention, the pot being formedoblong in horizontal section. Fig.2 is a horizontal section taken on theline 22 of Fig. 1. Fig. 3 is a vertical sectiontaken on the line 33 ofFig. 1. Fig. 4 is a similar view to Fig. 1 of part of the apparatusillustrating a slight modification. Fig.5 is a similar view to Fig. 2illustrating a means of drlving the blades, paddles or stirrers inopposite directions. Fig. 6-1s a plan of a pot with the cover removedillustrating the application of the inventionto a circular pot. Fig. 7is a horizontal section taken on' the line 4.--4 of Fig. 8 illustratinga further slight modification in the construction of the apparatus. Fig."8 is a VGItlCal section taken on the line 55 of Fig. 7. Fig. 9 is asimilar view. to Fig. l of the apparatus illustrating a further slightmodification. Fig. 10' is a vertical section taken. on the line 6-6 ofFig. 9. Fig. 11 is a similar view,to Fig. 3 of part of the apparatusillustrating a modified form of stirrer. view to Fig. 1 illustrating afurther modified form of stirrer. Fig.13 is a vertical section taken onthe line 77 of Fig. 12. Fig. 14 is a similar view to Fig. 1 of part ofthe apparatus illustrating a further modified form of stirrer. Fig. 15is a vertical section taken on the line 8-8 of Fig. 14.

Fig. 16 is a similar'view to 1 of part 01 the apparatus illustrating arther-modi Fig. 12 is a similar fied form of stirrer. Fig. 17 is avertical section taken on the line 9--9 of Fig. 16.

i Fig. 18' is a similar view to Fig. 1 of part of the apparatusillustrating a further modified form of stirrer. 'Fig. 19 a verticalsection taken on the line 10-10 of Fig. 18.

Fig." 20 is a-similar view to Fig. 1 of-part of the apparatusillustrating a further modi fied form of stirrer. Fig; 21' is averticalsection taken on the line 1111 of Fig. 20. Fig. 22 is a similarview to Fig. 1 ofpart of 1o fied form of stirrer. Fig. 27 is a parthorizontal section taken on the line 1l14 of.

Fig. 26. Fig. 28'is a similar view to Fig. 1

of part of the apparatus illustrating a modified arrangement ofstirrers.

similar view to Fig. 1 of part of the apparatus illustrating a furthermodified form of stirrer. Fig. 30 is a verticalsection taken on the line1515 of Fig. 29. Fig. 31 is a similar view to Fig. 3 illustrating afurther '20 slight modification and Fig. 32 is a similar viewillustrating a still further modification. In the several fi ures likeparts are indicated by similar I Figs. 4, 5 -and 11 to 13, 29,30, 31 and32'are drawn to an increased scale and Fig. 27 ,is-

drawn to a further increased scale with re.- spect to the other'figuresof the drawings.-

7 Referring to Figs. 1 to 3, a represents an oxid pot which is ofconsiderable height and 30 provided with a cover a which may be maderemovable if desired, and with inanholes closed by covers at designed tofacili-. tate the; cleaning out of the pot when re quired and arepresents a well or suppleimental pot arranged at the side or end ofthe pot a and connected therewith by away or, rneck a '6- representsbrickwork in which the pot is set and 6 represents a'furnace WlllOllserves to'maintain the metallic lead (1* 40 in the pots; a a in thenecessary fluid con-' -dition.- arepresents the blades of the paddles orstirrers, which blades are fixed to the spokesof-stzir shaped wheels orbosses-0 fixed upon-.a shaft 0 mounted in-bearings carried by'pedestalsmounted on\the bricks work I) and these pedestals may contain oil wellsfor lubricating the bearings, andwhich :feature is well known, and theshaft 0 has "fixed thereon, a pulley 0 adapted to receive .a strap orbelt (not shown)v by means of p which the shaft 0 may be driven suitablesource of power.

. The blades, .paddles or stirrersc instead of being mounted on avertical shaft and disposed horizontally near to the bottom of the pot aas heretofore are, according to the Y present 1nvention,"fixed on ahorizontal shaft (F so that in' their-revolution the blades, paddles,'or l stirrers 0 dash the fluid metallic from any lead 1* againstth'eside orend of the pot a thereby atomizmg or sub-dividing it and thus thewall of the pot a fulfils the oflice of the bathe ployed.

plate or curtainheretofore em- The form. of pot a it is preferred teem-Fig. 25 1s a vertical Fig. 29 is aetters of reference and' ploy inconjunction with the vertically disposed blades, paddles or stirrers ois a pot of'oblong shape in horizontal section, 'as shown moreparticularly in Fig. 2, although it might be used with a circular orother pot but perhaps not with the same advantage. The side walls of theoblong section pot receive any particles of metallic lead which may belaterally thrown by the blades, pad- .dles or stirrers and insure itsmore Or less. complete atomization or subdivision.

The blades, paddles or stirrers 0 are arranged at such anelevation andthe blades are of such dimensions that in their revolution the tipsofsaid blades do not descend below a point some distance above thebottom of the pot audit is thus possible to maintain a "considerabledepth of molten metallic lead in the pot a. By reason of thisconsiderable depth of molten metallic lead there is less liability forthe bottom' of 'the pot a to burnout while in the event of a fall ofaccumulations from the cover or sides of the'pot said accumulations willbe receivedby the body of molten lead and will float there instead offalling onto the bare bottom of the pot and fusing there as heretoforeand possibly bending the blades of the stirrers.

' The level of the molten metallic lead maintained in the oxid pot ashould .be such thatin the revolution of the blades, paddles or stirrersa the tips of-said blades in turn dip into or are submerged in themoltenmetallic lead a* to only a slight extent and it is found inpractice that by rotating the blades, paddles or stirrers c at asuitable speed the body; of molten lead is considerably agitated andmolten lead and dross are. dashed against the walls of the pot a andbroken up thereby sub-divided or atomized so. that the heated air or thelike is enabled to more fully act upon thesame.

In order to constantly maintain the required degree of immersion of thetipsof the blades, paddles or stirrers c or otherwise their relation tothe molten lead or dross it is desirable to regulate the feeding of leadto the oxid pot a more accurately than could be done by supplying itthrough a siphon as heretofore. supplemental pot or well a is providedat the side or end of the oxid pot a and connected with the latter by away or neck a or it might be'by a pipe as hereinafter described, andsaid way or neck a? is arranged at alevel below that at which it isdesired to maintain the molten lead in the oxid pot a so that the way orneck a is sealed by the molten. lead 00* and the? lead necessary tomaintain the required level in the oxid pot a is fed into thesupplemental pot a either, in a molten state or in the form ofpigs andmelted therein. 'The level of the molten lead a* being equal in bothpots a a it is In order to accomplish this the pot a.

' only necessary'to ascertain the proper working level in the "oxid pota whereupon the pot a into the supplemental pot a and so into-theatmosphere.

In some cases thepaddles or stirrers may be so arranged as to flick thedross from the surface of the molten lead.

A collecting chamber (Z is arranged at the side of the oxid pot a and isconnected therewith by a way d.

- A blast of air, preferably heated, or air and steam, either or both,is introduced into the oxid pot a at any suitable level through ahorizontal pipe 6 and the atomized or subdivided lead is carried upwardthereby and by reason of the height of the pot or from other causes andwholly or in part becomes oxidized while in suspension, the metallicparticles if any being separated by gravitation and the cloud of oxid iscarried by the blast through the way (1 into the collecting chamber d.Or the oxid might be carried through a heated uptake or upcast shaftsuch as a shown in Fig. 9 as. has heretofore been proposed or throughother oxidizing means on its way to the collecting chamber d.

In the example given at Fig. 4 the pot a {is shown to be provided witha' device adapted to receive the impact of the molten lead dashedagainst the wall of the pot a by the blades, paddles or stirrers 0 andthus" relieve the same of the principal wear. This device consists of acast steel plate a which may be of V-shaped formation in cross sectionand slightly hollowed as shown or of other suitable shape and boltedtothe end wall of the pot a so that it maybe easily renewed from time totime as occasion may demand. a a

In the example given at Fig. 5, is illustrated a modification whereintwo sets of blades, paddles or stirrers c are arranged to I work inopposite directions.

The blades 0 of one paddle or stirrer are carried b a star shaped boss0' similar to that descri d with respect to the previous figures fixed'upon a solid shaft 0 and the blades jc* of the other paddle or stirrerare carried by a star shaped boss 0* fixed upon a hollowshaft 0"surroundingthe' shaft Fixed upon the ends of the'shafts '0 0* respectively are miter wheels 0 and 0* with which meshes a miter wheel a fixedupon the end of a shaft 0 carrying the driving pulley 0*. 0 represents abearing for the end of the solid shaft 0* and 0 represents bearings forthe shaft 0 By this arrangement the blades, paddles or stirrers a 0* arecaused to turn in opposite directions and consequently to dash themolten lead against opposite sides or ends of the oxid pot a with anincreased effect as regards the output of oxid but obviously with aslightly increased expenditure of power for driving.

In the example given at'Fig. 6 an oxid pot is shown of circular insteadof oblong horizontal section. I

In the example given at Figs. 7 and 8 a modification is illustrated inwhich the sup plemental pot a is formed separate from the oxid pot a andconnected therewith at a suitable elevation by a pipe or neck a but theeffect in maintaining the level of the a molten lead in'the oxid pot ais similar to that hereinbefore described with respect to Figs. 1 to 3.The introduction of steam and heated air either or both is effected 'bymeans of an angularly disposed nozzle 6 into which are led a steam pipe6' and an air pipe e supplied from any. suitable sources. 1 In theexample given at Figs. 9 and 10 instead of forming the oxid pot a ofconsiderable height in order to bring about the oxidation or separationof the atomized or sub-divided lead while in suspension, the same effectis obtained by the employment of a low pot provided with an upcast shafta up which the oxid is carried onits way to the settling or collectingchamber 03 while if desired the upcast shaft a may be heated in anysuitable manner. In this example also the blades 0 of thepaddles orstirrers are axially twisted or set at an angle in order to modify theireffect upon the molten lead within the pot a. v v

In the example given at Fig. 11 the angle of the blades 0 is furtherincreased so that the planes of their faces are nearly at right anglesto the shaft 0 on which they are fixed. In the example given at Figs. 12and 13, this principle is further accentuated until the planes of thefaces of the blades 0 assume aposition at right angles to the shaft 0 sothat looking at them from the side they have the appearance of a diskwith gaps therein. The blades 0 may be provided with teeth orprojections on their sides or edges.

In the example given at Figsrl l and 15 .similardevice is shown exceptthat the disks nd stirrersc are formed with V shaped peripheral edges.

Inthe examplegiven'at Figs. 18 and 19,- the peripheral edges ofthe disksor stirrers c are shown to be formed with ratchet like teeth orprojections designed to pick up the I molten lead and dash'it againstthe walls of replaced by a single broad disk 'or drum 0 having broadteeth or projections extending across its periphery.

In the example given .at F lgs. 24 and 25.

two, or there might be more than two, disks 6 are shown having teeth orprojections on their sides or faces arranged at or near theirperipheries the object being the same as that hereinbefore' referred tonamely to agitate the lead and pick up some of it and dash it againstthe walls of the wpot. v

In the example given at Figs. 26 and 27 the disks 0 are formed withcontinuous rims having a conical or tapered cross section and providedwith ratchet like teeth ontheir side edges and saidteeth may be ofgradually increasing depth. By this construction of disk and byregulating the level of the molten lead in the pot a the area of the surface of the toothed disk acting on the molten lead may be varied asdesired.

In the-example given at Fig. 28 .two setsof disks, paddles or stirrersare shown to be mounted on parallel shafts c the distance apart of whichmay be arranged as desired and tlie shafts and therefore the stirrersmaybe driven in the same or opposite direc-* tions as may be desired.

In the-example given at Figs. 29 and 30 a further modification is shownin which blades 0 of the character herein first shown and described arecombined with disks 0 of a diameter greater than 'thedength of the"blades and designed to. dip deeper into the throw the same upward to.atomize it, and

molten lead. Y

In the example given at Fig. 31 is illustrated 'a modification in-whicha disk c or. it might be any other suitable form of paddle or stirrer.is mounted at right angles to an angularly disposed or-inclined shaft Inthe example given at Fig. 32 isillustrated a slight modification of thedevice shown and described with reference to Fig. 31. In this'case theshaft 0 is also inclined but the disk, paddle or stirrer is mounted inan inclined or angular position with relation to the shaft, the effectof which is to produce a wabbling motion of the disk 0 or'the like asshown by the dotted lines- The axis or axes of the blades, paddles,disks'or stirrers may be arranged in a horizontal position or positionsor in any desired position other than vertical so that said blades,paddles, disks or stirrers assumea vertical position or positions or anyother suitable position or positions other than horizontal and ifdesired the blastmay be induced by suction or exhaustion and in thisspecification and elaimsthe term blast is intended to include bothmethods. I

.The successful output of the pot is dependent on the height of the pot,the action and degree of acting surface or immersion of any of theblades, paddles, disks or stirrers, the speed at which the stirrers aredriven and the rate at which the pot is fed all of which features mustbe proportioned and regulated according to circumstances.

By themeans hereinbeforedescribed the disadvantages connected with theoxid producing apparatus heretofore employed are avoided and at the sametime the productive capacity of the plant is increased.

Having now particularly described. and

1. In apparatuslfor the production of lead oxid, in combination, a potadapted to contain the metallic lead, means for maintaining the lead ina molten state, a rotatable stirrer in said pot, the axis of saidstirrer being above the bath and forming an angle with the vertical, andthe blades thereof engageable with the lead to throw the same upward toatomize it, and means for rotating said stirrer.

2. In apparatus for the production of lead o'xid, in combination, apotadapted-to contain the metallic lead, .means for maintaining the leadin a molten st-ate,"a rotatable stirrer in said pot, the axis ofsaidstirrer being abovethe'ba'th and horizontal and the blades thereofengageable with the lead to means for rotating said stirrer.

3. In apparatus for the production of lead oxid, in combination, a potadapted to conthe lead to throw the same upward and 1 atomize it,.meansforrotating said stirrer, and means for maintaining a constant level ofthe lead within the .pot.

j WILLIAM INNES. w Witnesses:

. BWILLIAFLPIQINGLE,

Riormiui WARQBRIGK GEIDAR'IL.

